Hmm... Never heard any Tarakan speak of this... Where is he in outworld?

didnt hear it either

talk to the tartakans that are inside the tartakan camp in outworld.
one of them will tell you about Karasu.

I made the same thread the other day ("The ninja Karasu does not frequent this realm."- Generic Tarkatan)
I was told that Karasu was a character from "The Grid", one of Midway's other games. Which also featured Scorpion, Sub-Zero, and Noob Saibot in their MK4 versions, as secret characters.
Damn Midway, and their inside jokes!
Ka-Tra

Here is a pic of him

Those are horrible MK rip-offs.
Ka-Tra